Extension:ImageSizeInfoFunctions

MediaWiki extensions manual

ImageSizeInfoFunctions Release status: stable
Implementation	Parser function
Description	Return image width and height in pixel
Author(s)	Dario de Judicibus
Maintainer(s)	Giuseppe Briotti, Tim Aldridge
Latest version	1.1.1 (2016-01-05)
MediaWiki	1.25+
License	GNU General Public License 2.0 or later
Download	GitLab: project page git repository URL [help ] commit history Note: No localisation updates are provided by translatewiki.net .
Parameters $wgMessagesDir
Hooks used ParserFirstCallInit ParserClearState LocalisationCacheRecache

The ImageSizeInfoFunctions extension provides two parser functions returning width and height size of a given image, available in the wiki.

Its purpose is to make it easier to create a template for resizing an image in percentage instead of absolute size. This is useful for images gallery based on images of the same scale but different size.

Features

• imageWidth (imgw) returns the image width in pixel.
• imageHeight (imgh) returns the image height in pixel.

Installation

• Download and place the file(s) in a directory called ImageSizeInfoFunctions in your extensions/ folder.
• Add the following code at the bottom of your LocalSettings.php file:

  wfLoadExtension( 'ImageSizeInfoFunctions' );
  

•  Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

Usage

As for all parser functions:

{{#imgw: [image name] }}

{{#imgh: [image name] }}

Example

This template is useful for scaling the given image by percentage or, as usual, by absolute size:

<includeonly>[[Image:{{{imagename}}}|{{ #if:{{#pos:{{{newwidth|100}}}|px}}|{{{newwidth|100}}}| {{#expr: ({{#imgw: {{{imagename}}} }} * {{{newwidth|100}}}) / 100 }}px }}|{{{caption|}}}]]</includeonly>

Thus, assuming that the template is called ScaleImage:

Scaling the image to 15%:

{{ScaleImage</nowiki>
|imagename=eland.png
|caption=Città di Eland
|newwidth=15<nowiki>
}}

Scaling the image to 80 pixel:

{{ScaleImage</nowiki>
|imagename=eland.png
|caption=Città di Eland
|newwidth=80px<nowiki>
}}

Version history

• 0.0.1 - testing
• 1.0.0 - first stable release
• 1.0.1 - improvement suggested by G.Hagedorn in discussion page
• 1.1.0 - Updated the extension to be compatible with 1.19+
• 1.1.1 - Updated the extension to be compatible with 1.25+

Feedback

Use the discussion page for feedback, questions, feature requests and bug reports.

See also

• Extension:MediaFunctions - Provides various parser functions to obtain properties of media files